๐ฌ Important Chemistry Questions – First Year (8 Chapters) Chapter 1: Some Basic Concepts of Chemistry 1. Define mole and explain its significance. 2. What is molar mass? How is it calculated? 3. Derive and solve a numerical based on the law of conservation of mass. 4. Define empirical and molecular formula with examples. 5. Solve: Calculate the number of molecules in 5 grams of water. --- Chapter 2: Structure of Atom 1. State the main postulates of Bohr’s atomic model. 2. Derive the energy of an electron in hydrogen atom. 3. What are quantum numbers? Explain their significance. 4. Differentiate between orbit and orbital. 5. Solve: Calculate the wavelength of a photon emitted when an electron jumps from n = 3 to n = 2 in hydrogen. --- Chapter 3: Classification of Elements and Periodicity in Properties 1. Explain Mendeleev’s periodic law. 2. Define and give trends of ionization energy, atomic radius, and electronegativity. 3. How does atomic size vary across a period and down a gro...
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Here are important questions from Physics for First Year Science (Class 11) students, based on commonly studied chapters across many curricula (CBSE, State Boards, etc.). These questions focus on concept clarity and frequently asked topics in exams. ๐ญ๐ --- ✅ Chapter 1: Physical World & Measurement Important Questions: 1. What are the fundamental forces of nature? Explain any two. 2. Define and explain the concept of significant figures. 3. What is dimensional analysis? State its applications. 4. Derive the formula for the time period of a simple pendulum using dimensional analysis. 5. Differentiate between fundamental and derived quantities. --- ๐ค๐ช ✅ Chapter 2: Kinematics Important Questions: 1. Derive the three equations of motion using calculus/graphical method. 2. Define displacement, velocity, and acceleration with suitable examples. 3. A body moves with uniform acceleration. Derive expression for distance traveled in nth second. 4. Explain projectile motio...
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